package samples.chapter10;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;

import java.util.Collection;

public class Chapter10AccessDecisionManger implements AccessDecisionManager {
    @Override
    public void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes)
            throws AccessDeniedException, InsufficientAuthenticationException {
        Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
        for (ConfigAttribute configAttribute : configAttributes) {
            if ("ROLE_LOGIN".equals(configAttribute.getAttribute())
                    && authorities instanceof UsernamePasswordAuthenticationToken) {
                for (GrantedAuthority grantedAuthority : authorities) {
                    if (grantedAuthority.getAuthority().equals(configAttribute.getAttribute())) {
                        return;
                    }
                }
            }
        }
        throw new AccessDeniedException("权限不足");
    }

    @Override
    public boolean supports(ConfigAttribute attribute) {
        return true;
    }

    @Override
    public boolean supports(Class<?> clazz) {
        return true;
    }
}
